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94 lines
3.4 KiB
94 lines
3.4 KiB
# Kaleidoscope-MagicCombo
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![status][st:stable] [![Build Status][travis:image]][travis:status]
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[travis:image]: https://travis-ci.org/keyboardio/Kaleidoscope-MagicCombo.svg?branch=master
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[travis:status]: https://travis-ci.org/keyboardio/Kaleidoscope-MagicCombo
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[st:stable]: https://img.shields.io/badge/stable-✔-black.png?style=flat&colorA=44cc11&colorB=494e52
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[st:broken]: https://img.shields.io/badge/broken-X-black.png?style=flat&colorA=e05d44&colorB=494e52
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[st:experimental]: https://img.shields.io/badge/experimental----black.png?style=flat&colorA=dfb317&colorB=494e52
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The `MagicCombo` extension provides a way to perform custom actions when a
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particular set of keys are held down together. The functionality assigned to
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these keys are not changed, and the custom action triggers as long as all keys
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within the set are pressed. The order in which they were pressed do not matter.
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This can be used to tie complex actions to key chords.
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## Using the extension
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To use the extension, we must include the header, create a dictionary, and
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configure the plugin to use it:
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```c++
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#include <Kaleidoscope.h>
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#include <Kaleidoscope-MagicCombo.h>
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static const KaleidoscopePlugins::MagicCombo::dictionary_t dictionary[] PROGMEM = {
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{R1C3 | R2C1 | R2C4 | R2C7, // left hand,
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R0C11 | R1C12 | R2C14 //right hand
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},
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{0, 0}
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};
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void setup (void) {
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MagicCombo.configure (dictionary);
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Kaleidoscope.setup (KEYMAP_SIZE);
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Kaleidoscope.use (&MagicCombo, NULL);
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}
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```
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The dictionary **must** reside in `PROGMEM`, and is a list of tuples. Each
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element in the array has two fields: the left hand state, and the right hand
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state upon which to trigger the custom action. Both of these are bit fields,
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each bit set tells the extension that the key with that index must be held for
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the action to trigger. It is recommended to use the `RxCy` macros of the core
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`KaleidoscopeFirmware`, and *or* them together to form a bitfield.
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The dictionary **must** end with an element containing zero values for both the
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left and the right halves.
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## Extension methods
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The extension provides a `MagicCombo` singleton object, with the following method:
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### `.configure(dictionary)`
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> Configures the extension to use the supplied dictionary.
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### `.minInterval`
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> Restrict the magic action to fire at most once every `minInterval`
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> milliseconds.
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>
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> Defaults to 500.
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>
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> Not strictly a method, it is a variable one can assign a new value to.
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## Overrideable methods
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Whenever an combination is found to be held, the extension will trigger an
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action, in each scan cycle until the keys remain held. This is done by calling
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the overrideable `magicComboActions` function:
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### `magicComboActions(comboIndex, leftHand, rightHand)`
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> Called whenever a combination is found to be held. The function by default
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> does nothing, and it is recommended to override it from within the Sketch.
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>
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> The first argument will be the index in the dictionary, the other two are the
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> key states on the left and right halves, respectively.
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>
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> Plugins that build upon this extensions *should not* override this function,
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> but provide helpers that can be called from it. An override should only happen
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> in the Sketch.
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## Further reading
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Starting from the [example][plugin:example] is the recommended way of getting
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started with the plugin.
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[plugin:example]: https://github.com/keyboardio/Kaleidoscope-MagicCombo/blob/master/examples/MagicCombo/MagicCombo.ino
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